package com.cnfangmao.util;


import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class ImageUtils {
	 private static BASE64Encoder encoder = new BASE64Encoder();
	 private static BASE64Decoder decoder = new BASE64Decoder();
	/**

     * 对图片进行放大

     * @param originalImage 原始图片

     * @param times 放大倍数

     * @return

     */

    public static BufferedImage  zoomInImage(BufferedImage  originalImage, Integer times){

        int width = originalImage.getWidth()*times;

        int height = originalImage.getHeight()*times;

        BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());

        Graphics g = newImage.getGraphics();

        g.drawImage(originalImage, 0,0,width,height,null);

        g.dispose();

        return newImage;

    }

    /**

     * 对图片进行放大

     * @param srcPath 原始图片路径(绝对路径)

     * @param newPath 放大后图片路径（绝对路径）

     * @param times 放大倍数

     * @return 是否放大成功

     */

    public static boolean zoomInImage(String srcPath,String newPath,Integer times){

        BufferedImage bufferedImage = null;

        try {

            File of = new File(srcPath);

            if(of.canRead()){

                bufferedImage =  ImageIO.read(of);

            }

        } catch (IOException e) {

            //TODO: 打印日志

            return false;

        }

        if(bufferedImage != null){

            bufferedImage = zoomInImage(bufferedImage,times);

            try {

                //TODO: 这个保存路径需要配置下子好一点

                ImageIO.write(bufferedImage, "JPG", new File(newPath)); //保存修改后的图像,全部保存为JPG格式

            } catch (IOException e) {

                // TODO 打印错误信息

                return false;

            }

        }

        return true;

    }

    /**

     * 对图片进行缩小

     * @param originalImage 原始图片

     * @param times 缩小倍数

     * @return 缩小后的Image

     */

    public static BufferedImage  zoomOutImage(BufferedImage  originalImage, Integer times){

        int width = originalImage.getWidth()/times;

        int height = originalImage.getHeight()/times;

        BufferedImage newImage = new BufferedImage(width,height,originalImage.getType());

        Graphics g = newImage.getGraphics();

        g.drawImage(originalImage, 0,0,width,height,null);

        g.dispose();

        return newImage;

    }

    /**

     * 对图片进行缩小

     * @param srcPath 源图片路径（绝对路径）

     * @param newPath 新图片路径（绝对路径）

     * @param times 缩小倍数

     * @return 保存是否成功

     */

    public static boolean zoomOutImage(String srcPath,String newPath,Integer times){

        BufferedImage bufferedImage = null;

        try {

            File of = new File(srcPath);

            if(of.canRead()){

                bufferedImage =  ImageIO.read(of);

            }

        } catch (IOException e) {

            //TODO: 打印日志

            return false;

        }

        if(bufferedImage != null){

            bufferedImage = zoomOutImage(bufferedImage,times);

            try {

                //TODO: 这个保存路径需要配置下子好一点

                ImageIO.write(bufferedImage, "JPG", new File(newPath)); //保存修改后的图像,全部保存为JPG格式

            } catch (IOException e) {

                // TODO 打印错误信息

                return false;

            }

        }

        return true;

    }

    public static String getBase64FromImageBinary(String strFilePath) {
        try {
            File f = new File(strFilePath);
            
        	BufferedImage bi = ImageIO.read(f);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ImageIO.write(bi, "jpg", baos);
            byte[] bytes = baos.toByteArray();

            return encoder.encodeBuffer(bytes).trim();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }

    static void getImageFrombase64String(String base64String,String strImageFilePath) {
        try {
            byte[] bytes1 = decoder.decodeBuffer(base64String);
            ByteArrayInputStream bais = new ByteArrayInputStream(bytes1);
            BufferedImage bi1 = ImageIO.read(bais);
            File f1 = new File(strImageFilePath);
            ImageIO.write(bi1, "jpg", f1);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
